Entomological Society of Canada

198 Pages·2010·11.16 MB·English

I-HE INSEOTS
AND
ARAOHNIDS
OF CANADA

THE
INSEOTS
AND ARACHNIDS
OF CANADA
I?ART 9
The
Sac Spiders
of Can adaand Alaska
Arane?e' Clubionidae
and Anyphaenidae
Charles D. Dondale
and
James H. Redner
Biosystematics Research Institute
Ottawa, Ontario
Research Branch
Agriculture Canada
Publication 1724 1982
@ Minister of Supply and Services Canada 1982
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Cataloguc \o. A 42-42i 1982-98 Canada: $8.95
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The Insects and Arachnids of Canada
Part 1. Collecting, Preparing, and Preserving Insects, Mites, and Spiders,
compiled by J. E. H. Martin, Biosystematics Research Institute, Ottawa, 1977.
Part2.The Bark Beetles of Canada and Alaska (Coleoptera: Scolytidae), by D. E.
Bright, Jr., Biosystematics Research Institute, Ottawa, 1976.
Part 3. The Aradidae of Canada (Hemiptera: Aradidae), by R. Matsuda,
Biosystematics Research Institute, Ottaw a, 197 7 .
Part 4. The Anthocoridae of Canada and Alaska (Heteroptera: Anthocoridae), by
L. A. Kelton, Biosystematics Research Institute, Ottawa, 1978.
Part 5. The Crab Spiders of Canada and Alaska (Araneae: Philodromidae and
Thomisidae), by C. D. Dondale and J. H. Redner, Biosystematics Research
Institute. Ottawa. 1978.
Part 6. The Mosquitoes of Canada (Diptera: Culicidae), by D. M. Wood, P. T.
Dang, and R. A. Ellis, Biosystematics Research Institute, Ottawa, 19'19.
Partiei . Genera des Trichoptdres du Canada et des Etats adjacents, par F. Schmid,
Institut de recherches biosyst6matiques, Ottawa, 1980.
Part 8. The Plant Bugs of the Prairie Provinces of Canada (Heteroptera: Miridae),
by L. A. Kelton, Biosystematics Research Institute, Ottawa, 1980.

Contents
Acknowledgments.. ........
1
Introduction ... .. ... 1
Anatomy
8
Family Clubionidae Wagner l0
Key to genera of Clubionidae 15
Genus Cheiracanthium C.L. Koch 11
Key to species of Cheiracanthinn l8
GentsClubionalatreille ........ 22
Key to species groups of Clubiona 23
The trivialis group 26
.
Key to species of the trivialis group . 26
The maritina group . Jz+
The abboti grotp 31
Key to species ofthe abboti group . 37
The o&esa group OZ
Key to species of the obesa group . o1,
The reclusa group 80
.
Key to species of the recla.ia group 80
The lutescens group . 89
Key to species of the lutescenr group 90
The pallidula group . 91
Genus C lubionoldes Edwards o?
GenusCas/raneira Keyserling .... 99
.
Key to species of Castianetra l0l
ll8
Genus Agroeca Westring
il9
Key to species of Agroeca
GentsTrachelas L. Koch t23
Key to species ofTrachelas t21
Genus Phrurotirnpus Chamberlin & Ivie 130
KeytospeciesofPhrurotinpus .........131
Genr-rsScollne//aBanks .........140
KeytospeciesofScotinella ..... l'+l
Family Anyphaenidae Bertkau . . 163
KeytogeneraofAnyphaenidae .........165
Genus,4_r'sft a Keyserling 166
Genus Wul.fila O. Pickard-Cambridge t69
G enus An t p h aena Sundevall t12
Key to species of Antphaena 171
Glossary of anatomical terms . 183
References 188
Tndex to genera and species 193
.

Acknowledg ments
This work is based mainly on the spider collection in the Canadian National
Collection of Insects, Arachnids, and Nematodes at Ottawa. Other notable
collections were made available on loan to the authors by Dr. Brian Ainscough of
the British Columbia Provincial Museum, Dr. David Barr of the Royal Ontario
Museum, Mr. Donald Buckle of Saskatoon, Dr. H. W. Levi of the Museum of
Comparative Zoology at Harvard University, Dr. Norman Platnick of the
American Museum of Natural History in New York, Dr. R. Leech of Edmonton,
Dr. Geoffrey Scudderof the University of British Columbia, and Dr' Barry Wright
of the Nova Scotia Museum of Science. The authors also wish to express
indebtedness to colleagues at the Biosystematics Research Institute and to Dr. B.
J. Kaston for reviewing the manuscript, and to Patricia Loshak for her excellent
editing.
lntroduction
Part 5 in this series provides a key to spider families, a detailed treatment of
the crab spiders (families Philodromidae and Thomisidae) as represented in
Canada, and a glossary of anatomical terms (Dondale and Redner 1978). The
present part deals with two additional families of the hunting spiders in Canada,
namely, Clubionidae and Anyphaenidae, which together are called sac spiders.
The sac spiders constitute a group of two-clawed hunting spiders with a world
fauna of perhaps 1500 species . They have been treated as a single family by many
workers, but are treated separately here in view of the qualitative differences in
tracheation and in the setae forming the claw tufts (see Comments under both
families).
The term "sac spiders" derives from the construction by many of these
spiders of flattened tubular retreats of dense white silk; the sacs are usually made in
rolled leaves or under bark. Many of the members of this group are nocturnal,
spending the daylight hours in the sac, whereas others are active in daylight or
darkness and live mainly in the dimness between layers of plant litter in forests,
bogs, or swamps. They are swift runners, and take their prey by suddenly moving
upon and seizing it with their stout toothed chelicerae.
The sac spiders that live among plants are collected best by sweep nets or
beating trays. The ground dwellers may be caught in pitfall traps or by searches
beneath logs or stones. Preservation is by immersioninT5Vo ethyl or isopropyl
alcohol in neoprene-stoppered homeopathic vials. The reader is referred to Part 5
of this series (Dondale and Redner 1978) for techniques pertaining to specimen
examination. One modification in the present work is the illustration of
spermathecae in ventral view, i.e., as seen through the wall of the epigynum.
which is immersed in clove oil.
Starting with this contribution, we have decided to provide bilingual keys for
all issues of this series. We hope that this will make the series more useful to our
readers.
Anatomy
The sac spiders have elongate cylindrical bodies and rather stout legs (Figs. I
,
2, 6-8, l0- 13, 244,319,332). The two body divisions, cephalothorax (ceph)
and abdomen (abd), arejorned by a slenderpedicel. The cephalothorax is covered
dorsally by a shieldlike carapace (car), which bears the eyes and the dorsal groove
(gr), and is covered ventrally by a flat plate, the sternum (sr), and the lower lip, or
labium (lab). The principal mouthparts and the legs project to the front or sides
from the membrane joining the edges of carapace and sternum.
The eyes are in four pairs arranged in two transverse rows close to the anterior
margin of the carapace. They are designated as anterior medians (ame), anteior
laterals (aie), posterior medians (pme), and posterior laterals (p/e). Either row
(viewed dorsally) may be straight, procurved, orrecurved according to species or
genus. Spacing within the row may also be of taxonomic importance.
The principal mouthparts are the paired pincerlike chelicerae (chel) andpalpi.
Each chelicera comprises a large basal segment and a distal fang; the fang lies,
when at rest, in a groove, the margins of which are armed with small teeth. The
palpi (Fig. 5) lie immediately posterior to the chelicerae; their basal segments, the
coxae (cx), have expanded lobes (pc.r/), which form the sides of the preoral cavity
and contain glands that pour out digestive fluids over the prey. The other segments
are trochanter (rro), femur (fem),pateIla(pat),tlbia (tib), tarsus (tar), and a small
clawlike pretarsus @tar) . The tarsus, tibia, and to a lesser extent the patella of the
palpus of adult males (Figs. 14,l'7, 18,21) are highly modified to form the
copulatory organ, the principal parts of which are a dorsal hollowed cymbium
(cym) and the genital bulb. The genital bulb consists primarily of a convex
well-sclerotized tegulum (teg), within which can be discerned part of the winding
seminal duct, and an intromittent organ, the embolus (e). The embolus usually
rests on a plate or membranous area called the conductor (con). The palpal tibia
bears a stout retrolateral apophysis (ra), much used in classifying spiders, and
more rarely a ventral (va) or dorsal apophysis (da).
The legs of sac spiders are in four pairs of approximately equal length and
thickness, and are numbered I-IV from the anterior end (Fig. 8). The segments
from base to tip are the coxa, trochanter, femur, patella, tibia, tarsus (subdivided
into basitarsus (btar) and distitarsus (dtar)), and pretarsus (Fig. 6). The pretarsus
bears two claws (c/) that are often hidden in a dense claw tuft (clt), and a scopula
(scop) (Fig. 3). Some segments typically bear macrosetae (mset) (Fig. 7), the
arrangement of which is often useful in classification.
The abdomen of sac spiders is elongate and cylindrical, and may be covered
dorsally by an inconspicuous scutum (Fig. 10). The position of the heart is often
indicated externally by a pigmented heart mark (hm) (Fig. 1); small muscle
attachment points may be visible. Ventrally the abdomen is traversed by the
genital groove (SS) Fig. 2), in which lies the opening of the internal genitalia to
the outside; the female's opening is protected by a well-sclerotized plate, the
epigynum (epig), which also bears the paired copulatory openings (co) (Fig. 15).
The copulatory openings lead inward through the copulatory tubes (cr) (Fig. 16) to
the spermathecae (spt), where semen is stored until the eggs are laid. When the
R